<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        *{
            padding: 0;
            margin: 0;
        }
        .box{
            width: 100px;
            height: 100px;
            background-color: skyblue;
            animation: move 5s ease infinite;
        }
        @keyframes move{
            0%{
                transform: translateX(0);
            }
            25%{
                transform: translateX(500px);
            }
            50%{
                transform: translateX(500px) translateY(500px);
            }
            75%{
                transform: translateX(500px) translateY(500px) translateX(-500px);
            }
            100%{
                transform: translateX(500px) translateY(500px) translateX(-500px) translateY(-500px);
            }
        }
    </style>
</head>
<body>
    <div class="box"></div>
</body>
</html>